Date: Sun, 21 Dec 2025 11:05:32 +0100
From: kernel test robot <lkp@intel.com>
To: Timur Tabi <ttabi@nvidia.com>, Gary Guo <gary@garyguo.net>,
	Danilo Krummrich <dakr@kernel.org>, rust-for-linux@vger.kernel.org,
	John Hubbard <jhubbard@nvidia.com>,
	Joel Fernandes <joelagnelf@nvidia.com>,
	Alexandre Courbot <acourbot@nvidia.com>,
	Lyude Paul <lyude@redhat.com>, nouveau@lists.freedesktop.org
Cc: oe-kbuild-all@lists.linux.dev
Subject: Re: [PATCH v3 9/9] gpu: nova-core: create GSP-RM logging buffers
 debugfs entries
Message-ID: <202512211136.RZfacOxt-lkp@intel.com>
References: <20251218013910.459045-10-ttabi@nvidia.com>
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20251218013910.459045-10-ttabi@nvidia.com>

Hi Timur,

kernel test robot noticed the following build errors:

[auto build test ERROR on ea1013c1539270e372fc99854bc6e4d94eaeff66]

url:    https://github.com/intel-lab-lkp/linux/commits/Timur-Tabi/rust-pci-add-PCI-device-name-method/20251218-121537
base:   ea1013c1539270e372fc99854bc6e4d94eaeff66
patch link:    https://lore.kernel.org/r/20251218013910.459045-10-ttabi%40nvidia.com
patch subject: [PATCH v3 9/9] gpu: nova-core: create GSP-RM logging buffers debugfs entries
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20251221/202512211136.RZfacOxt-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251221/202512211136.RZfacOxt-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512211136.RZfacOxt-lkp@intel.com/

All errors (new ones prefixed by >>):

   PATH=/opt/cross/clang-20/bin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
   INFO PATH=/opt/cross/rustc-1.88.0-bindgen-0.72.1/cargo/bin:/opt/cross/clang-20/bin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
   /usr/bin/timeout -k 100 12h /usr/bin/make KCFLAGS= -fno-crash-diagnostics -Wno-error=return-type -Wreturn-type -funsigned-char -Wundef W=1 --keep-going LLVM=1 -j32 -C source O=/kbuild/obj/consumer/x86_64-rhel-9.4-rust ARCH=x86_64 SHELL=/bin/bash rustfmtcheck
   make: Entering directory '/kbuild/src/consumer'
   make[1]: Entering directory '/kbuild/obj/consumer/x86_64-rhel-9.4-rust'
   Diff in drivers/gpu/nova-core/gsp/boot.rs:164:
    
            let this = self.as_mut().project();
    
   -        this.cmdq.send_command(bar, commands::SetSystemInfo::new(pdev))?;
   +        this.cmdq
   +            .send_command(bar, commands::SetSystemInfo::new(pdev))?;
            this.cmdq.send_command(bar, commands::SetRegistry::new())?;
    
            gsp_falcon.reset(bar)?;
   Diff in drivers/gpu/nova-core/gsp/boot.rs:164:
    
            let this = self.as_mut().project();
    
   -        this.cmdq.send_command(bar, commands::SetSystemInfo::new(pdev))?;
   +        this.cmdq
   +            .send_command(bar, commands::SetSystemInfo::new(pdev))?;
            this.cmdq.send_command(bar, commands::SetRegistry::new())?;
    
            gsp_falcon.reset(bar)?;
>> Diff in drivers/gpu/nova-core/gsp.rs:192:
            // Look up nova_core debugfs directory - only create entries if it exists.
            // If nova_core doesn't exist, debugfs_dir will be empty and file creation
            // becomes a no-op (data is still stored, just not exposed via debugfs).
   -        let debugfs_dir = debugfs::Dir::lookup(c_str!("nova_core"), None)
   -            .unwrap_or_else(debugfs::Dir::empty);
   +        let debugfs_dir =
   +            debugfs::Dir::lookup(c_str!("nova_core"), None).unwrap_or_else(debugfs::Dir::empty);
    
            let logs = debugfs_dir.scope(log_buffers, pdev.name(), |logs, dir| {
                dir.read_binary_file(c_str!("loginit"), &logs.loginit);
   Diff in drivers/gpu/nova-core/gsp/boot.rs:164:
    
            let this = self.as_mut().project();
    
   -        this.cmdq.send_command(bar, commands::SetSystemInfo::new(pdev))?;
   +        this.cmdq
   +            .send_command(bar, commands::SetSystemInfo::new(pdev))?;
            this.cmdq.send_command(bar, commands::SetRegistry::new())?;
    
            gsp_falcon.reset(bar)?;
>> Diff in drivers/gpu/nova-core/gsp.rs:192:
            // Look up nova_core debugfs directory - only create entries if it exists.
            // If nova_core doesn't exist, debugfs_dir will be empty and file creation
            // becomes a no-op (data is still stored, just not exposed via debugfs).
   -        let debugfs_dir = debugfs::Dir::lookup(c_str!("nova_core"), None)
   -            .unwrap_or_else(debugfs::Dir::empty);
   +        let debugfs_dir =
   +            debugfs::Dir::lookup(c_str!("nova_core"), None).unwrap_or_else(debugfs::Dir::empty);
    
            let logs = debugfs_dir.scope(log_buffers, pdev.name(), |logs, dir| {
                dir.read_binary_file(c_str!("loginit"), &logs.loginit);
   make[1]: Leaving directory '/kbuild/obj/consumer/x86_64-rhel-9.4-rust'
   make[2]: *** [Makefile:1871: rustfmt] Error 123
   make[2]: Target 'rustfmtcheck' not remade because of errors.
   make[1]: *** [Makefile:248: __sub-make] Error 2
   make[1]: Target 'rustfmtcheck' not remade because of errors.
   make: *** [Makefile:248: __sub-make] Error 2
   make: Target 'rustfmtcheck' not remade because of errors.
   make: Leaving directory '/kbuild/src/consumer'

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https://github.com/intel/lkp-tests/wiki